package mockit;
   
   import static org.junit.jupiter.api.Assertions.assertEquals;
   import static org.junit.jupiter.api.Assertions.assertFalse;
   import static org.junit.jupiter.api.Assertions.assertNotNull;
   import static org.junit.jupiter.api.Assertions.assertNull;
   import static org.junit.jupiter.api.Assertions.assertSame;
   import static org.junit.jupiter.api.Assertions.assertTrue;
   
  import org.junit.jupiter.api.Test;
  
  /**
   * The Class FakeInvocationTest.
   */
  final class FakeInvocationTest {
  
      /**
       * The Class Collaborator.
       */
      public static class Collaborator {
  
          /** The value. */
          int value;
  
          /**
           * Instantiates a new collaborator.
           */
          Collaborator() {
          }
  
          /**
           * Instantiates a new collaborator.
           *
           * @param i
           *            the i
           */
          public Collaborator(int i) {
              value = i;
          }
  
          /**
           * Gets the value.
           *
           * @return the value
           */
          public int getValue() {
              return -1;
          }
  
          /**
           * Sets the value.
           *
           * @param i
           *            the new value
           */
          public void setValue(int i) {
              value = i;
          }
  
          /**
           * Do something.
           *
           * @param b
           *            the b
           * @param i
           *            the i
           * @param s
           *            the s
           *
           * @return the string
           */
          public String doSomething(boolean b, int[] i, String s) {
              return s + b + i[0];
          }
  
          /**
           * Static method.
           *
           * @return true, if successful
           */
          public static boolean staticMethod() {
              return true;
          }
      }
  
      /**
       * The Class FakeMethods.
       */
      static final class FakeMethods extends MockUp<Collaborator> {
  
          /**
           * Static method.
           *
           * @param context
           *            the context
           *
           * @return true, if successful
           */
          @Mock
         static boolean staticMethod(Invocation context) {
             assertNotNull(context);
             assertNull(context.getInvokedInstance());
             assertEquals(1, context.getInvocationCount());
             return false;
         }
 
         /**
          * Gets the value.
          *
          * @param context
          *            the context
          *
          * @return the value
          */
         @Mock
         int getValue(Invocation context) {
             assertTrue(context.getInvokedInstance() instanceof Collaborator);
             assertEquals(0, context.getInvocationIndex());
             return 123;
         }
     }
 
     /**
      * Fake methods for methods without parameters.
      */
     @Test
     void fakeMethodsForMethodsWithoutParameters() {
         new FakeMethods();
         assertFalse(Collaborator.staticMethod());
         assertEquals(123, new Collaborator().getValue());
     }
 
     /**
      * Instance fake method for static method.
      */
     @Test
     void instanceFakeMethodForStaticMethod() {
         new MockUp<Collaborator>() {
             @Mock
             boolean staticMethod(Invocation context) {
                 assertNull(context.getInvokedInstance());
                 assertEquals(context.getInvocationCount() - 1, context.getInvocationIndex());
                 return context.getInvocationCount() <= 0;
             }
         };
 
         assertFalse(Collaborator.staticMethod());
         assertFalse(Collaborator.staticMethod());
     }
 
     /**
      * Fake methods with invocation parameter.
      */
     @Test
     void fakeMethodsWithInvocationParameter() {
         new MockUp<Collaborator>() {
             Collaborator instantiated;
 
             @Mock
             void $init(Invocation inv, int i) {
                 assertNotNull(inv.getInvokedInstance());
                 assertTrue(i > 0);
                 instantiated = inv.getInvokedInstance();
             }
 
             @Mock
             String doSomething(Invocation inv, boolean b, int[] array, String s) {
                 assertNotNull(inv);
                 assertSame(instantiated, inv.getInvokedInstance());
                 assertEquals(1, inv.getInvocationCount());
                 assertTrue(b);
                 assertNull(array);
                 assertEquals("test", s);
                 return "mock";
             }
         };
 
         String s = new Collaborator(123).doSomething(true, null, "test");
         assertEquals("mock", s);
     }
 
     /**
      * The Class FakeMethodsWithParameters.
      */
     static class FakeMethodsWithParameters extends MockUp<Collaborator> {
 
         /** The captured argument. */
         int capturedArgument;
 
         /** The faked instance. */
         Collaborator fakedInstance;
 
         /**
          * $init.
          *
          * @param context
          *            the context
          * @param i
          *            the i
          */
         @Mock
         void $init(Invocation context, int i) {
             capturedArgument = i + context.getInvocationCount();
             assertNull(fakedInstance);
             assertTrue(context.getInvokedInstance() instanceof Collaborator);
             assertEquals(1, context.getInvokedArguments().length);
         }
 
         /**
          * Sets the value.
          *
          * @param context
          *            the context
          * @param i
          *            the i
          */
         @Mock
         void setValue(Invocation context, int i) {
             assertEquals(i, context.getInvocationIndex());
             assertSame(fakedInstance, context.getInvokedInstance());
             assertEquals(1, context.getInvokedArguments().length);
         }
     }
 
     /**
      * Fake methods with parameters.
      */
     @Test
     void fakeMethodsWithParameters() {
         FakeMethodsWithParameters mock = new FakeMethodsWithParameters();
 
         Collaborator col = new Collaborator(4);
         mock.fakedInstance = col;
 
         assertEquals(5, mock.capturedArgument);
         col.setValue(0);
         col.setValue(1);
     }
 
     /**
      * Use of context parameters for JRE methods.
      *
      * @throws Exception
      *             the exception
      */
     @Test
     void useOfContextParametersForJREMethods() throws Exception {
         new MockUp<Runtime>() {
             @Mock
             Process exec(Invocation inv, String command, String[] envp) {
                 assertSame(Runtime.getRuntime(), inv.getInvokedInstance());
                 assertEquals(0, inv.getInvocationIndex());
                 assertNotNull(command);
                 assertNull(envp);
                 return null;
             }
         };
 
         assertNull(Runtime.getRuntime().exec("test", null));
     }
 
     /**
      * The Class FakeByMethodNameOnly.
      */
     public static final class FakeByMethodNameOnly extends MockUp<Collaborator> {
 
         /**
          * Do something.
          *
          * @param inv
          *            the inv
          *
          * @return the string
          */
         @Mock
         public static String doSomething(Invocation inv) {
             Object[] args = inv.getInvokedArguments();
             assertEquals(3, args.length);
             return "fake";
         }
     }
 
     /**
      * Fake method by name only using public fake.
      */
     @Test
     void fakeMethodByNameOnly_usingPublicFake() {
         new FakeByMethodNameOnly();
 
         String result = new Collaborator().doSomething(true, new int[] { 1, 2 }, "test");
 
         assertEquals("fake", result);
     }
 
     /**
      * Fake method by name only using anonymous fake.
      */
     @Test
     void fakeMethodByNameOnly_usingAnonymousFake() {
         new MockUp<Collaborator>() {
             @Mock
             String doSomething(Invocation inv) {
                 Object[] args = inv.getInvokedArguments();
                 assertEquals(3, args.length);
                 return "fake";
             }
         };
 
         String result = new Collaborator().doSomething(true, new int[] { 1, 2 }, "test");
 
         assertEquals("fake", result);
     }
 
     /**
      * The Class PublicFakeForConstructorUsingInvocation.
      */
     public static final class PublicFakeForConstructorUsingInvocation extends MockUp<Collaborator> {
 
         /**
          * $init.
          *
          * @param inv
          *            the inv
          */
         @Mock
         public void $init(Invocation inv) {
         }
     }
 
     /**
      * Fake constructor using public fake class with public fake method having invocation parameter.
      */
     @Test
     void fakeConstructorUsingPublicFakeClassWithPublicFakeMethodHavingInvocationParameter() {
         new PublicFakeForConstructorUsingInvocation();
 
         new Collaborator();
     }
 }